What it is: Budding engineers will love littleBits ($100+), tiny circuit boards that snap together with magnets. Each board serves a specific function (light, sound, sensors, buttons, thresholds, pulse, motors, etc). Once they're snapped together they make larger circuits that turn, move, etc. No wiring or programming necessary.
What it teaches: Creativity, engineering, ingenuity
Who it's for: Ages 8+